package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSONArray;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.heima.apis.article.IArticleClient;
import com.heima.common.aliyun.GreenImageScan;
import com.heima.common.aliyun.GreenTextScan;
import com.heima.common.tess4j.Tess4jClient;
import com.heima.file.service.FileStorageService;
import com.heima.model.article.dtos.ArticleDto;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.wemedia.pojos.WmChannel;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmSensitive;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.utils.common.SensitiveWordUtil;
import com.heima.wemedia.mapper.WmChannelMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmSensitiveMapper;
import com.heima.wemedia.mapper.WmUserMapper;
import com.heima.wemedia.service.WmNewsAutoScanService;
import com.heima.wemedia.service.WmNewsService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Lazy;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.URL;
import java.util.*;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;


@Service
@Slf4j
@Transactional
@RequiredArgsConstructor
public class WmNewsAutoScanServiceImpl implements WmNewsAutoScanService {

    private final WmNewsMapper wmNewsMapper;
    private final WmSensitiveMapper wmSensitiveMapper;
    private final Tess4jClient tess4jClient;
    @Lazy
    @Autowired
    private WmNewsService wmNewsService;
    @Autowired
    private IArticleClient articleClient;
    @Autowired
    private WmChannelMapper wmChannelMapper;
    @Autowired
    private WmUserMapper wmUserMapper;
    @Autowired
    private FileStorageService fileStorageService;
    @Autowired
    private GreenImageScan greenImageScan;
    @Autowired
    private GreenTextScan greenTextScan;

    /**
     * 自媒体文章审核
     *
     * @param id 自媒体文章id
     */
    @Async
    @Transactional
    public void autoScanWmNews(WmNews wmNews) {
        log.info("开启自动审核,id:{}", wmNews.getId());

        if (wmNews.getStatus().equals(WmNews.Status.SUBMIT.getCode())) {
            // 从内容中提取纯文本内容和图片
            Map<String, Object> textAndImages = handleTextAndImages(wmNews);

            // 自管理的敏感词过滤
            boolean isSensitive = handleSensitiveScan((String) textAndImages.get("content"), wmNews);
            if (!isSensitive) {
                log.error("敏感词审核未通过，id：{}", wmNews);
                return;
            }

            // 2.审核文本内容，阿里云接口
            boolean isTextScan = handleTextScan((String) textAndImages.get("content"), wmNews);
            if (!isTextScan) {
                log.error("文本审核未通过，id：{}", wmNews);
                return;
            }

            // 3.审核图片，阿里云接口
            boolean isImageScan = handleImageScan((List<String>) textAndImages.get("images"), wmNews);
            if (!isImageScan) {
                log.error("图片审核未通过，id：{}", wmNews);
                return;
            }

            // 4.审核成功，保存 app 端的相关的文章数据
            ResponseResult responseResult;
            try {
                responseResult = saveAppArticle(wmNews);
            } catch (Exception e) {
                log.error("保存 app 端文章数据失败，id：{}，错误信息：{}", wmNews.getId(), e.getMessage());
                throw new RuntimeException("WmNewsAutoScanServiceImpl-文章审核，保存 app 端相关文章数据失败");
            }
            if (!responseResult.getCode().equals(200)) {
                log.error("保存 app 端文章数据失败，响应码不是 200，id：{}", wmNews.getId());
                throw new RuntimeException("WmNewsAutoScanServiceImpl-文章审核，保存 app 端相关文章数据失败");
            }
            // 回填 article_id
            wmNews.setArticleId((Long) responseResult.getData());
            try {
                updateWmNews(wmNews, (short) 9, "审核成功");
            } catch (Exception e) {
                log.error("更新文章失败，id：{}，错误信息：{}", wmNews.getId(), e.getMessage());
                throw new RuntimeException("WmNewsAutoScanServiceImpl-文章审核，更新文章失败");
            }
        }
    }

    // 提取获取文章的逻辑为单独方法
    private WmNews getArticleById(Integer id) {
        int count = 1;
        while (count < 6) {
            WmNews wmNews = getWmNews(id);
            if (wmNews != null) {
                return wmNews;
            }
            log.info("第" + count + "次尝试自动审核文章：" + id);
            count++;
            try {
                TimeUnit.SECONDS.sleep(3);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }
        return null;
    }

    /**
     * 自管理的敏感词审核
     *
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleSensitiveScan(String content, WmNews wmNews) {

        boolean flag = true;

        //获取所有的敏感词
        List<WmSensitive> wmSensitives = wmSensitiveMapper.selectList(Wrappers.<WmSensitive>lambdaQuery().select(WmSensitive::getSensitives));
        List<String> sensitiveList = wmSensitives.stream().map(WmSensitive::getSensitives).collect(Collectors.toList());

        //初始化敏感词库
        SensitiveWordUtil.initMap(sensitiveList);

        //查看文章中是否包含敏感词
        Map<String, Integer> map = SensitiveWordUtil.matchWords(content);
        if (map.size() > 0) {
            updateWmNews(wmNews, (short) 2, "当前文章中存在违规内容" + map);
            flag = false;
        }

        return flag;
    }

    @Transactional
    public WmNews getWmNews(Integer id) {
        return wmNewsMapper.selectById(id);
    }

    /**
     * 保存app端相关的文章数据
     *
     * @param wmNews
     */
    private ResponseResult saveAppArticle(WmNews wmNews) {

        ArticleDto dto = new ArticleDto();
        //属性的拷贝
        BeanUtils.copyProperties(wmNews, dto);
        //文章的布局
        dto.setLayout(wmNews.getType());
        //频道
        WmChannel wmChannel = wmChannelMapper.selectById(wmNews.getChannelId());
        if (wmChannel != null) {
            dto.setChannelName(wmChannel.getName());
        }

        //作者
        dto.setAuthorId(wmNews.getUserId().longValue());
        WmUser wmUser = wmUserMapper.selectById(wmNews.getUserId());
        if (wmUser != null) {
            dto.setAuthorName(wmUser.getName());
        }

        //设置文章id
        if (wmNews.getArticleId() != null) {
            dto.setId(wmNews.getArticleId());
        }
        dto.setCreatedTime(new Date());

        ResponseResult responseResult = articleClient.saveArticle(dto);
        return responseResult;

    }

    /**
     * 审核图片
     *
     * @param images
     * @param wmNews
     * @return
     */
    private boolean handleImageScan(List<String> images, WmNews wmNews) {

        boolean flag = true;

        if (images == null || images.isEmpty()) {
            return flag;
        }

        //下载图片 minIO
        //图片去重
        images = images.stream().distinct().collect(Collectors.toList());

        //审核图片
        try {
            for (String image : images) {
                //图片识别文字审核---begin-----
                // 通过img下载图片到本地
                URL url = new URL(image);
                File tmpDir = new File("C:\\tmp");
                if (!tmpDir.exists()) {
                    tmpDir.mkdirs();
                }
                // 下载文件
                String fileSuffix = image.substring(image.lastIndexOf("."));
                String filePath = "C:\\tmp\\temp" + fileSuffix;
                try (BufferedInputStream in = new BufferedInputStream(url.openStream());
                     FileOutputStream fileOutputStream = new FileOutputStream(filePath)) {
                    byte[] dataBuffer = new byte[1024];
                    int bytesRead;
                    while ((bytesRead = in.read(dataBuffer, 0, 1024)) != -1) {
                        fileOutputStream.write(dataBuffer, 0, bytesRead);
                    }
                }
                //从byte[]转换为butteredImage
                FileInputStream fis = new FileInputStream("C:\\tmp\\temp" + fileSuffix);
                byte[] buffer = new byte[fis.available()];
                fis.read(buffer);
                fis.close();
                ByteArrayInputStream bais = new ByteArrayInputStream(buffer);
                BufferedImage imageFile = ImageIO.read(bais);

                //识别图片的文字
                String result = tess4jClient.doOCR(imageFile);

                //审核是否包含自管理的敏感词
                boolean isSensitive = handleSensitiveScan(result, wmNews);
                if (!isSensitive) {
                    return false;
                }
                //图片识别文字审核---end-----
            }
            Map map = greenImageScan.imageScan(images);
            if (map != null) {
                //审核失败
                if (map.get("suggestion").equals("block")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 2, "当前文章中存在违规内容");
                }

                //不确定信息  需要人工审核
                if (map.get("suggestion").equals("review")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 3, "当前文章中存在不确定内容");
                }
            }

        } catch (Exception e) {
            flag = false;
            e.printStackTrace();
        }
        return flag;
    }

    /**
     * 审核纯文本内容
     *
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleTextScan(String content, WmNews wmNews) {

        boolean flag = true;

        if ((wmNews.getTitle() + "-" + content).length() == 0) {
            return flag;
        }

        try {
            Map map = greenTextScan.greeTextScan((wmNews.getTitle() + "-" + content));
            if (map != null) {
                //审核失败
                if (map.get("suggestion").equals("block")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 2, "当前文章中存在违规内容");
                }

                //不确定信息  需要人工审核
                if (map.get("suggestion").equals("review")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 3, "当前文章中存在不确定内容");
                }
            }
        } catch (Exception e) {
            flag = false;
            e.printStackTrace();
        }

        return flag;

    }

    /**
     * 修改文章内容
     *
     * @param wmNews
     * @param status
     * @param reason
     */
    private void updateWmNews(WmNews wmNews, short status, String reason) {
        wmNews.setStatus(status);
        wmNews.setReason(reason);
        wmNewsMapper.updateById(wmNews);
    }

    /**
     * 1。从自媒体文章的内容中提取文本和图片
     * 2.提取文章的封面图片
     *
     * @param wmNews
     * @return
     */
    private Map<String, Object> handleTextAndImages(WmNews wmNews) {

        //存储纯文本内容
        StringBuilder stringBuilder = new StringBuilder();

        List<String> images = new ArrayList<>();

        //1。从自媒体文章的内容中提取文本和图片
        if (StringUtils.isNotBlank(wmNews.getContent())) {
            List<Map> maps = JSONArray.parseArray(wmNews.getContent(), Map.class);
            for (Map map : maps) {
                if (map.get("type").equals("text")) {
                    stringBuilder.append(map.get("value"));
                }

                if (map.get("type").equals("image")) {
                    images.add((String) map.get("value"));
                }
            }
        }
        //2.提取文章的封面图片
        if (StringUtils.isNotBlank(wmNews.getImages())) {
            String[] split = wmNews.getImages().split(",");
            images.addAll(Arrays.asList(split));
        }

        Map<String, Object> resultMap = new HashMap<>();
        resultMap.put("content", stringBuilder.toString());
        resultMap.put("images", images);
        return resultMap;

    }
}